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The ever‐growing demands for efficient energy storage accelerate the development of high‐rate lithium‐metal battery (LMB) with desirable energy density, power density, and cycling stability. Nevertheless, the practical application of LMB is critically impeded by internal temperature rise and lithium dendrite growth, especially at high charge/discharge rates. It is highly desired but remains challenging...
Nano‐Kirigami Structures
In article number 2305171, Jiafang Li, Yang Wang, and co‐workers demonstrate a thermal emission manipulation method enabled by metal nano‐kirigami structures, which are consisted by rotated slit lines. The modulation is achieved by the dynamic plasmon resonance mode of the slit, whose shape and width changes as the nano‐kirigami structure deforms from planar to stereo.
The nano‐kirigami metasurfaces have controllable 3D geometric parameters and dynamic transformation functions and therefore provide a strong spectral regulation capability of thermal emission. Here, the authors propose and demonstrate a dynamic and multifunctional thermal emitter based on deformable nano‐kirigami structures, which can be actuated by electronic bias or mechanical compression. Selective...
Carbon Atomic Steps
At the graphene step edge, the armchair (AC) structure gives only a minor topographic effect on friction, while the zigzag (ZZ) structure induces friction two orders of magnitude larger than the basal friction. The high‐friction ZZ edge becomes superlubricious through reconstructing to the (5,7) azulene‐like structure upon thermal annealing in an inert gas environment. More details...
Two‐dimensional (2D) lamellar materials are normally capable of rendering super‐low friction, wear protection, and adhesion reduction in nanoscale due to their ultralow shear strength between two basal plane surfaces. However, high friction at step edges prevents the 2D materials from achieving super‐low friction in macroscale applications and eventually leads to failure of lubrication performance...
Thermal transport in polymer nanocomposites becomes dependent on the interfacial thermal conductance due to the ultra‐high density of the internal interfaces when the polymer and filler domains are intimately mixed at the nanoscale. However, there is a lack of experimental measurements that can link the thermal conductance across the interfaces to the chemistry and bonding between the polymer molecules...
A fundamental understanding of metal active sites in single‐atom catalysts (SACs) is important and challenging in the development of high‐performance catalyst systems. Here, a highly efficient and straightforward molten‐salt‐assisted approach is reported to create atomically dispersed cobalt atoms supported over vanadium pentoxide layered material, with each cobalt atom coordinated with four neighboring...
Electrochemical nitrate reduction to ammonia (NRA) provides an efficient, sustainable approach to convert the nitrate pollutants into value‐added products, which is regarded as a promising alternative to the industrial Haber–Bosch process. Recent studies have shown that oxygen vacancies of oxide catalysts can adjust the adsorption energies of intermediates and affect their catalytic performance. Compared...
Oral cancer has a high mortality rate, and its treatment often causes debilitating complications. More than 90% of oral cancers are oral squamous cell carcinomas (OSCCs) that may develop from clinically recognizable oral premalignant lesions (OPLs). To eradicate OPLs before they turn into cancers, a non‐invasive topical formulation is developed based on a novel combination of synergistically acting...
Lead‐free Cs2AgBiBr6 double perovskite is considered to be a promising alternative to the traditional lead‐based analogues due to its long carrier lifetime, high structural stability, and non‐toxicity. However, the large band gap limits its absorption of visible light, which is not conducive to further optoelectronic applications. Herein, a thermochromic strategy is reported to decrease the band gap...
Cell mechanical forces play fundamental roles in regulating cellular responses to environmental stimulations. The shortcomings of conventional methods, including force resolution and cellular throughput, make them less accessible to mechanical heterogeneity at the single‐cell level. Here, a DNA tensioner platform is introduced with high throughput (>10 000 cells per chip) and pN‐level resolution...
Bornite (Cu5FeS4) is an Earth‐abundant, nontoxic thermoelectric material. Herein, twin engineering and Se alloying are combined in order to further improve its thermoelectric performance. Cu5FeS4−xSex (0 ≤x≤ 0.4) icosahedral nanoparticles, containing high‐density twin boundaries, have been synthesized by a colloidal method. Spark plasma sintering retains twin boundaries in the pellets sintered from...
2D materials, of which the carrier type and concentration are easily tuned, show tremendous superiority in electronic and optoelectronic applications. However, the achievements are still quite far away from practical applications. Much more effort should be made to further improve their performance. Here, p‐type MoSe2 is successfully achieved via substitutional doping of Ta atoms, which is confirmed...
Exploring signal amplification strategies to enhance the sensitivity of lateral flow immunoassay (LFIA) is of great significance for point‐of‐care (POC) testing of low‐concentrated targets in the field of in vitro diagnostics. Here, a highly‐sensitive LFIA platform using compact and hierarchical magneto–fluorescent assemblies as both target‐enrichment substrates and optical sensing labels is demonstrated...
2D layered photodetectors have been widely researched for intriguing optoelectronic properties but their application fields are limited by the bandgap. Extending the detection waveband can significantly enrich functionalities and applications of photodetectors. For example, after breaking through bandgap limitation, extrinsic Si photodetectors are used for short‐wavelength infrared or even long‐wavelength...
The cover shows the extrinsic photoconduction induced Ge‐based polarization‐sensitive photodetector. The structure of the Ge‐based photodetector is shown in the upper left corner. The amplified crystal structure of GeSe with several Ge vacancies is shown in the middle. Additionally, the image of excess carriers being excited by a polarized light is shown in the lower right corner. In article number...
Biologically plausible computing systems require fine‐grain tuning of analog synaptic characteristics. In this study, lithium‐doped silicate resistive random access memory with a titanium nitride (TiN) electrode mimicking biological synapses is demonstrated. Biological plausibility of this RRAM device is thought to occur due to the low ionization energy of lithium ions, which enables controllable...
Colloidal lithography technology based on monolayer colloidal crystals (MCCs) is considered as an outstanding candidate for fabricating large‐area patterned functional nanostructures and devices. Although many efforts have been devoted to achieve various novel applicatons, the quality of MCCs, a key factor for the controllability and reproducibility of the patterned nanostructures, is often overlooked...
Semiconducting nanowires offer many opportunities for electronic and optoelectronic device applications due to their unique geometries and physical properties. However, it is challenging to synthesize semiconducting nanowires directly on a SiO2/Si substrate due to lattice mismatch. Here, a catalysis‐free approach is developed to achieve direct synthesis of long and straight InSe nanowires on SiO2/Si...
The improvement of activity of electrocatalysts lies in the increment of the density of active sites or the enhancement of intrinsic activity of each active site. A common strategy to realize dual active sites is the use of bimetal compound catalysts, where each metal atom contributes one active site. In this work, a new concept is presented to realize dual active sites with tunable electron densities...
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